Files
simdjson-simdjson/include/simdjson/fallback/stringparsing.h
T
strager 5510089d45 Improve build times for debug builds (#1859)
* Rename simdjson_really_inline -> simdjson_inline

I want to change the simdjson_really_inline macro to sometimes not force
inlining. After that upcoming change, the name simdjson_really_inline
will no longer makes sense.

Rename simdjson_really_inline to simdjson_inline. This patch should not
change semantics; simdjson_inline still forces inlining as before.

Some functions still need to be really inlined for ABI reasons.
(GCC's -Wpsabi complains otherwise.) Leave those functions marked as
simdjson_really_inline.

* Improve build times for debug builds

simdjson_inline is used for most simdjson functions. It forces inlining.
In unoptimized/debug builds, this can lead to a lot of machine code
being generated (especially with Address Sanitizer), causing slow
compilation.

Change simdjson_inline to force inlining only for optimized builds.

Sometimes, the programmer might want a slightly-optimized build and want
fast compilation (e.g. GCC's -Og mode). Allow simdjson users to define
the simdjson_inline macro themselves (e.g. on the command line:
-Dsimdjson_inline=inline) in cases where the default behavior is
undesired.

This patch reduced build times by over 75% for ondemand_object_tests.cpp
with GCC 9.4.0 and CMAKE_BUILD_TYPE=Debug on my AMD 5950X:

Before: 6.885 6.683 6.971 6.957 6.949 seconds (5 samples)
After:  1.492 1.551 1.494 1.490 1.531 seconds (5 samples)
2022-07-19 15:14:33 -04:00

37 lines
1.1 KiB
C++

#ifndef SIMDJSON_FALLBACK_STRINGPARSING_H
#define SIMDJSON_FALLBACK_STRINGPARSING_H
#include "simdjson/base.h"
namespace simdjson {
namespace SIMDJSON_IMPLEMENTATION {
namespace {
// Holds backslashes and quotes locations.
struct backslash_and_quote {
public:
static constexpr uint32_t BYTES_PROCESSED = 1;
simdjson_inline static backslash_and_quote copy_and_find(const uint8_t *src, uint8_t *dst);
simdjson_inline bool has_quote_first() { return c == '"'; }
simdjson_inline bool has_backslash() { return c == '\\'; }
simdjson_inline int quote_index() { return c == '"' ? 0 : 1; }
simdjson_inline int backslash_index() { return c == '\\' ? 0 : 1; }
uint8_t c;
}; // struct backslash_and_quote
simdjson_inline backslash_and_quote backslash_and_quote::copy_and_find(const uint8_t *src, uint8_t *dst) {
// store to dest unconditionally - we can overwrite the bits we don't like later
dst[0] = src[0];
return { src[0] };
}
} // unnamed namespace
} // namespace SIMDJSON_IMPLEMENTATION
} // namespace simdjson
#include "simdjson/generic/stringparsing.h"
#endif // SIMDJSON_FALLBACK_STRINGPARSING_H